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Traffic Engineering Extensions to OSPF for GMPLS Control of Evolving G.709 Optical Transport Networks
RFC 7138

Internet Engineering Task Force (IETF)                D. Ceccarelli, Ed.
Request for Comments: 7138                                      Ericsson
Category: Standards Track                                       F. Zhang
ISSN: 2070-1721                                      Huawei Technologies
                                                              S. Belotti
                                                          Alcatel-Lucent
                                                                  R. Rao
                                                    Infinera Corporation
                                                                J. Drake
                                                                 Juniper
                                                              March 2014

                 Traffic Engineering Extensions to OSPF
     for GMPLS Control of Evolving G.709 Optical Transport Networks

Abstract

   This document describes Open Shortest Path First - Traffic
   Engineering (OSPF-TE) routing protocol extensions to support GMPLS
   control of Optical Transport Networks (OTNs) specified in ITU-T
   Recommendation G.709 as published in 2012.  It extends mechanisms
   defined in RFC 4203.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7138.

Ceccarelli, et al.           Standards Track                    [Page 1]
RFC 7138           OSPF-TE Extensions for OTN Support         March 2014

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Ceccarelli, et al.           Standards Track                    [Page 2]
RFC 7138           OSPF-TE Extensions for OTN Support         March 2014

Table of Contents

   1. Introduction ....................................................4
      1.1. Terminology ................................................4
   2. OSPF-TE Extensions ..............................................4
   3. TE-Link Representation ..........................................6
   4. ISCD Format Extensions ..........................................6
      4.1. Switching Capability Specific Information ..................8
           4.1.1. Switching Capability Specific Information
                  for Fixed Containers ................................9
           4.1.2. Switching Capability Specific Information
                  for Variable Containers ............................10
           4.1.3. Switching Capability Specific Information --
                  Field Values and Explanation .......................10
   5. Examples .......................................................13
      5.1. MAX LSP Bandwidth Fields in the ISCD ......................13
      5.2. Example of T, S, and TS Granularity Utilization ...........17
           5.2.1. Example of Different TS Granularities ..............18
      5.3. Example of ODUflex Advertisement ..........................20
      5.4. Example of Single-Stage Muxing ............................22
      5.5. Example of Multi-Stage Muxing -- Unbundled Link ...........23
      5.6. Example of Multi-Stage Muxing -- Bundled Links ............25
      5.7. Example of Component Links with Non-Homogeneous
           Hierarchies ...............................................27
   6. OSPFv2 Scalability .............................................29
   7. Compatibility ..................................................30
   8. Security Considerations ........................................30
   9. IANA Considerations ............................................31
      9.1. Switching Types ...........................................31
      9.2. New Sub-TLVs ..............................................31

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